page is reserved for news and resources related to the book
Printable PDF of Figure 4.3-1, on measuring bearings. It's a little easier to measure the angles without the curvature caused by the spine of the printed book.
A new section on Star and Planet Brightness (will replace 11.20 in future editions since the gov closed down both the time tics and the storm warnings)
Free Nautical Almanacs to download.
It is the users responsibility to check these before departure. You can use www.starpath.com/usno to get to a place with accurate values.
– Almanacs from SV Inua (full copies of current, past, or future years)
– thenauticalalmanac.com (this might be the same data, but with convenient links to related tables, plus a spread sheet for sight reeducation... none checked by us.)
– Tecepe offers way to make your own specific pages, 3 days at a time.
– www.fer3.com offers accurate data for all bodies one day at a time (need corrections and star dec, sha from other sources)
– the USNO Air Almanac offers the same data but in different format. It is a free download.
Excellent way to check intermediate steps from any sight reduction method: Celestial Tools by Stan Klein (plus other useful cel nav resources)
information from Pub 117 See also this note from USNO on UT (The NIST time service was threatened with closure in 2019, but it survived.)
Celestial Navigator's Dream Machine from USNO (our shortcut link: www.starpath.com/usno) includes online Almanac data for specific time and place
USNO Supplement to the Almanac (much interesting information)
Read About the Starpath Online
to ION compilation of articles on cel nav
Foundation Newsletter articles on Navigation
Article on the Solar Index Correction Method
Article on the importance of evaluating a plotted fix to see that our assumptions are met.
Article on Star and Planet Brightness
Article on Star Names
See also our full article index of cel nav topics.
See also our full video playlist on cel nav topics.
Atlantic No. 5274 and Pacific No. 5270 Printable tracking charts (great circle), referenced on page 118.
Sextant Sight Planning with the Air Almanac's Sky Diagrams. Short of the StarPilot electronic solution, this is likely the fastest and easiest ways to select the best triad of sights for a cel nav fix.
Books on celestial navigation from Starpath (also available